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md: Fix removal of extra drives when converting RAID6 to RAID5
authorNeilBrown <neilb@suse.de>
Thu, 13 Jan 2011 22:14:34 +0000 (09:14 +1100)
committerNeilBrown <neilb@suse.de>
Thu, 13 Jan 2011 22:14:34 +0000 (09:14 +1100)
commitbf2cb0dab8c97f00a71875d9b13dbac17a2f47ca
tree68587eaff5c7cb85628c1f68aecb19f2a18c8f6etree | snapshot
parentba1b41b6b4e30cb66ae2775faadea05cae3ce61ccommit | diff
md: Fix removal of extra drives when converting RAID6 to RAID5

When a RAID6 is converted to a RAID5, the extra drive should
be discarded.  However it isn't due to a typo in a comparison.

This bug was introduced in commit e93f68a1fc6 in 2.6.35-rc4
and is suitable for any -stable since than.

As the extra drive is not removed, the 'degraded' counter is wrong and
so the RAID5 will not respond correctly to a subsequent failure.

Cc: stable@kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/md.c diff | blob | history
Port of xen3.3 xenlinux code to Ubuntu Precise kernel (3.2)